Show quicksilver IN california fletcher hamilton state mineralogist of california announces that the new bulletin of the state mining bureau on quicksilver has been received from the printer and is now ready for distribution it is bulletin no 78 entitled quicksilver resources of california by walter W bradley of the bureaus staff it is the first work published in fifteen years dealing distinctly with quicksilver and its metallurgy and had but two predecessors in this particular field G F beckers geology of the quicksilver de of the pacific slope monograph III of the U S geological survey and win Forst ners quicksilver resources of california bulletin no 27 of the state mining bureau through this new publication covers a much greater scope particularly as regards the ore dressing and metallurgy of quicksilver california yields approximately 70 per cent of the quicksilver output of the united states and since 1850 has produced a total of flasks flacks to the end of 1917 valued at the book contains production and price charts which show the annual fluctuations of values and quantities and the entire work is profusely illustrated with photographs drawings and geological maps the section on metallurgy contains numerous photographic cuts and line drawings of furnaces condensers and other plant equipment A sectional drawing of the very recently installed rotary furnaces of the new idria company is included concentration methods the metallurgical work detailed includes an all account of the authors original invests r t lations relative to concentration methods as H applied to quicksilver ores which included treatment on tables with water flotation with oils and solution by an alkaline sulphide the quicksilver industry though relatively speaking not as large nor as extensive as i some other branches of the mineral business is nevertheless a very vital one in peace times as well as in war in normal peace times mes 50 per cent of our quicksilver con emption goes into fulminate for blasting aads cads ps for quarrying and mining as well as ammunition in addition a considerable amount goes into the manufacture of drugs some me also is used in gold and silver min 1 mg we ve should not permit ourselves to become dependent on foreign sources for this K very ry necessary metal without a sufficiently ay high protective import duty the united states ates is at the present time in danger of liaina ng it its domestic quicksilver industry bottled rott led by foreign competition particularly from m mexico and spain the recovery of ick 1018 silver ilver requires capital for equipment and d time for development and is not a busi ass mss es which can be picked up and put on ia seducing producing basis at a moments notice copies of bulletin no 78 may be obtained for postpaid from the state mining bureau ferry san francisco or room union league los angeles f |